Actually a great engine in a small sports car. Not so hot for an s10 or a heep
CK5
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700r4 Transmission feels off?
- Thread starter nycxjeremyy
- Start date
Thanks Wes and Blue. I was going off the info that a 700r4 was a 0.7:1 overdrive. Regardless, I get the picture. Better get into some lower gears!
nycxjeremyy
Registered Member
What would be shift points of the 700r4? Got my cable adjusted and it went from shifting at 25MPH (for 1st to 2nd gear) to at 19MPH
3.08s will kill a 700r4.
The need rpms to feed the pump and circulate the fluid.
Fwiw, I'm fixing my 700r4 with a nv4500.
The need rpms to feed the pump and circulate the fluid.
Fwiw, I'm fixing my 700r4 with a nv4500.
I’ve heard 3:08’s kill 700’s. I’m sure folks are speaking from experience, but I’ve been running that set up for years. I do primarily use it as a daily driver and generally take it pretty easy, but still going strong. I run 35’s too. Maybe crawling kills em, not sure.
19mph is about right for 1st shift.
Having said that, I wouldn’t hate some lower gears, simply for more lower end.
19mph is about right for 1st shift.
Having said that, I wouldn’t hate some lower gears, simply for more lower end.
There is no set MPH for the shift points, like an electronically controlled one that uses a shift table. It depends on what gears you have and what tires, plus a lot of uncertainties with a mechanical governor and hydraulic circuits balancing an uncertain pressure against a spring of unknown wear. Remember the governor is driven by the output of the transmission and has no idea how fast the vehicle is moving. The important things are that the shift points happen at reasonable times for driving and the line pressure is proportional to the torque going through the transmission. You would need pressure measurements to know for sure, but basically it shouldn't be slipping when it shifts. You should feel the shift, but it shouldn't be banging (or at least not much, depending on how your transmission is set up). You could get a gauge and verify line pressure at idle and max cable pull to know for sure it's right. Then shift points can be adjusted separately (that is not what the TV cable setting is for).
It's all about matching the differentials to the tires. If you stick with the smaller 29" tire, 3.08 marginally works. It's basically the same as 3.73 with 35" tires. 3.08 could be OK with the small tires and no O/D.
